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Condor Earth Technologies, Inc. <br /> 21663 Bnan Lame Sonora CA 95370(209)532-0361 <br /> 188 Frank West Circle Suite I Stockton CA 95206 (209)234-0518 <br /> February 12, 2002 Condor Project No 2038 <br /> FIRST QUARTER GROUNDWATER MONITORING REPORT <br /> JANUARY 2002 <br /> MAR 3 ZDOZ <br /> Site Address: Canepa's Car Wash ENVIRO1djAENT HEALTH <br /> 248 East Park Street PERMIT/SERVICES <br /> Stockton, California <br /> Client- Mr Remo Canepa <br /> 1536 North Hunter Street <br /> Stockton, California <br /> Primary Agency Jeffrey C F Wong, San Joaquin County Public Health Services, Environmental <br /> Health Division (PHS/EHD) <br /> Copy to Marry Hartzel, California Regional Water Quality Control Board(CRWQCB) <br /> • This is a report of the results of the first quarter, 2002 groundwater monitoring event conducted on <br /> January 8, 2002 at the above-referenced site Figures indicating the site location, groundwater elevation <br /> contours, groundwater elevation fluctuations, MTBE and benzene concentrations (Attachment A, Figures <br /> 1, 2, 3, 4 and 5, respectively) are attached to this report Site background information is included as <br /> Attachment B Also attached are benzene and MTBE concentration versus time graphs, historical <br /> monitoring data, field forms, and laboratory analytical results As noted above, this report has been <br /> submitted to the PHS/EHD and the CRWQCB <br /> Summary of January 2002 Quarterly Groundwater Monitoring Results <br /> Field Activity <br /> Number of groundwater wells 7 Number of WRundwater wells sampled 7 <br /> Number of groundwater wells monitored 7 Date(s)monitored and sam led 1/8/2002 <br /> Site Hydrology <br /> Average depth to groundwater below 24 82 feet Average increase(+)/decrease(—) in depths —0 37 feet <br /> monitor well measuring points(bgs) bgs to roundwater since last sampling <br /> Approximate flow direction and Northeast Contours generally appear to converge <br /> groundwater Vdient. toward well MW-2 <br /> Groundwater Contamination <br /> Wells containing free product None Wells with detected odors 4 <br /> Number of wells with concentrations 4 Number of wells with concentrations at or 3 <br /> below benzene MCL above benzene MCL _ <br /> Nature of coritammation BTEX, Range in concentrations <br /> 9,500 <br /> TPH-G Benzene(1ig/L.) <a s- <br /> <oas-59s9 <br /> MTBE TPH-G(mg/L) 14-18 <br /> MTBE ( ) <br /> M CONDOR <br />